Oscillating lever for operating pump-pistons, &amp;c.



. R. BILT.

OSGILLATING LEVER. POR OPERATING PUMP PISTONS, dao.

.APPLICATION FILED 00T.8, 1913.

REUBEN Humor WEST SoMEnvILLn, MASSACHUSETTS.

QSCILLATING LEVER FOR OPERATING' PUMP-PISTON S, &C.

Specification of Letters Patent.

Patented Mar. 24, 1914.

Appleation filed October 8, 1918. Serial No. 794,136.

To all whom t may concern Be it known that I, REUBEN'HILT, a citi- Zenof the United States, and resident of West Somerville, in the county ofMiddlesex and State of Massachusetts, have invented certain new anduseful Improvements in Oscillating Levers for Operating Pump-` Pistons,&c., of which the following is a specification.

This invention relates to an oscillatory lever employed to impartrectilinear movement to a pump piston or other reciprocating device.

The specific embodiment of the invention shown in this application is alever employed in a monot-ype machine for imparting motion to the pistonof a pump employed for moving melted type metal, one arm of the leverbeing bifurcated and provided with cheek pieces which are movablyengaged with the divisions of the bifurcated lever arm so that they mayturn or rock on Said divisions, the cheek pieces being provided withbearing faces which engage shoulders on a piston rod or plunger, theconstruction and arrangement being such that when the lever isoscillated it imparts through the cheek pieces a rectilinearreciprocating movement to the plunger, the latter being in slidingengagement with the cheek pieces to compensate for the diii'erence indirection between the rectilinear path of the plunger and thecurvilinear path of the cheek pieces.

The invention has for its object to provide an improved construction ofthe said cheek pieces for the purpose of connecting them durably withthe lever in such manner as to prevent liability of loose wabbling mo-vtion of the cheek pieces, and to enable the cheek pieces so nearly toinclose the lever arms that they form boxes adapted to confine graphiteor other refractory lubricant between the internal surfaces of the cheekpieces and the external surfaces of the lever with which they are inrubbing contact.

Vhen my invention is embodied in a lever for operating the type met-alpump plunger of a monotype machine, the cheek pieces and the portions ofthe lever on which they bear are maintained at such a high temperaturethat ordinary combustible lubricants cannot be employed.

My improvement hereinafter vdescribed enables the lubrication of thecheek pieces by graphite to be suitably maintained.

The invention consists in the improve ments which I will now proceed todescribe and claim.

`Of the accompanying drawings which form a part of thisspeciiicatio-n,-Fig

ure 1 is a Side elevation of a pump lever embodying my invention; Fig. 2is a plan thereof partly in section as on the line 2 2 of Fig. 1; Fig. 3is a sectional detail as on the line 3 3 of Fig. 2; Figs. 4 and 5 areperspective views of the respective parts of one of the cheek pieces.

Similar reference characters indicate the same parts in all the figures.

In the drawings,-6 designates a lever adapted to oscillate on a centralfulcrum between its arms, the lever being oscillated by power applied inany suitable way to one of said arms. The opposite arm which impartsmotion from the lever to a plunger or piston rod 7 is bifurcated to formdivisions 8, each having a segmental edge 9 and a circular socket orbearing 10 concentric with said edge.

To each division S is applied a cheek piece which is adapted to rock onthe segmental edge 9, the latter constituting a bearing for the cheekpiece, and being provided with a trunnion which enters and is adapted torock in the bearing 10.

Each cheek piece comprises a flat sided body portion 11 adapted to bearon the inner side of one of the lever divisions 8, a trunnion 12projecting from one side of the body portion 11 and formed integrallytherewith or attached rigidly thereto, the trunnion being fitted to turnin the socket l0, and a substantially U-shaped iange 13 having asegmental inner face 14, the greater portion of which is concentric withthe trunnion 12. The flange 13 has upper and lower flat faces 15 whichabut against opposed shoulders 16 o-n the piston rod or plunger 7, saidrod having a reduced squared portion 17 located between the two cheekpieces. Each cheek piece also includes a cap piece 18 which is a iiatmetal plate having the same marginal contour as the flange 13, andadapted, when placed upon the outer edge of said flange, to close theouter side of the space between the segmental inner wall 14 and trunnion12.

The cap piece 18 is placed on the outer edge of the flange 13 after thelatter has been applied to the lever. The cap piece is then firmlyattached to the flange, prefer ably by a welding operation, the weldingbeing caused by the application of the iame of a welding torch to thejoint between the flange and the cap plate. Il desired, however, the capplate may be attached by electric welding or brazing. The attachment ofthe cap, as described, converts .the cheek piece into a box whichpractically incloses the segmental end portion of the lever division towhich the cheek piece is applied.

The cap piece bears closely against the outer side oit the Aleverdivision 8, and while permitting` the cheek piece to oscillate to theextent required, it prevents any loose lateral wabbling motion of thecheek piece, and at the same time, is adapted to confine graphiteinserted between the contacting surfaces of Vthe cheek piece and lever.

It will be seen ,that the cheek piece and the cap piece united theretoas described, constitute practically a single unitary part having nomember or Vmembers liable to be loosened or disconnected, no screws,rivets or other separable fastening devices being employed in securingthe two cheek pieces f to the lever.

It is obvious that my invention may be embodied in a single lever arm Sand single cheek piece secured thereto, as described.

I claim z- An oscillatory lever or arm having a transverse circularsocket, a segmental bearing edge substantially concentric with thesocket and a cheek piece formed to bear 0n one side of the lever andhaving a trunnion fitted to turn in said socket, a liange having asegmental i-nner face in sliding contact with `the segmental edge faceof the lever and external -faces formed to engage shoulders on a movablerod, and a cap piece attached as described to the outer edge of saidflange and forming, with the cheek piece and liange, a. box inclosingthe portion of the lever having the segmental edge.

Signed at Boston, in the county of Suffolk and State voie Massachusetts,this seventh day of October, A. D. 1913.

REUBEN HILT.

Witnesses F. 7. HERRIGK, E. O. HOWARD.

Copies of this patent may be obtained 'for ive cents each, by addressingthe Commissioner of latentl Washington, iD. C.

